From: Ronan Pigott <ronan@rjp.ie>
Date: Fri, 29 Dec 2023 18:28:08 +0000 (-0700)
Subject: dns: add svcparam iana enum constants
X-Git-Tag: v256-rc1~1119^2~5
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ee9581e5e96611567311275292301b4f8f62e09a;p=thirdparty%2Fsystemd.git

dns: add svcparam iana enum constants
---

diff --git a/src/resolve/resolved-dns-packet.c b/src/resolve/resolved-dns-packet.c
index b0b5bab6bd0..6c45b1e5ef8 100644
--- a/src/resolve/resolved-dns-packet.c
+++ b/src/resolve/resolved-dns-packet.c
@@ -2776,6 +2776,27 @@ const char *format_dns_ede_rcode(int i, char buf[static DECIMAL_STR_MAX(int)]) {
         return snprintf_ok(buf, DECIMAL_STR_MAX(int), "%i", i);
 }
 
+static const char* const dns_svc_param_key_table[_DNS_SVC_PARAM_KEY_MAX_DEFINED] = {
+        [DNS_SVC_PARAM_KEY_MANDATORY]       = "mandatory",
+        [DNS_SVC_PARAM_KEY_ALPN]            = "alpn",
+        [DNS_SVC_PARAM_KEY_NO_DEFAULT_ALPN] = "no-default-alpn",
+        [DNS_SVC_PARAM_KEY_PORT]            = "port",
+        [DNS_SVC_PARAM_KEY_IPV4HINT]        = "ipv4hint",
+        [DNS_SVC_PARAM_KEY_ECH]             = "ech",
+        [DNS_SVC_PARAM_KEY_IPV6HINT]        = "ipv6hint",
+        [DNS_SVC_PARAM_KEY_DOHPATH]         = "dohpath",
+        [DNS_SVC_PARAM_KEY_OHTTP]           = "ohttp",
+};
+DEFINE_STRING_TABLE_LOOKUP_TO_STRING(dns_svc_param_key, int);
+
+const char *format_dns_svc_param_key(uint16_t i, char buf[static DECIMAL_STR_MAX(uint16_t)+3]) {
+        const char *p = dns_svc_param_key_to_string(i);
+        if (p)
+                return p;
+
+        return snprintf_ok(buf, DECIMAL_STR_MAX(uint16_t)+3, "key%i", i);
+}
+
 static const char* const dns_protocol_table[_DNS_PROTOCOL_MAX] = {
         [DNS_PROTOCOL_DNS]   = "dns",
         [DNS_PROTOCOL_MDNS]  = "mdns",
diff --git a/src/resolve/resolved-dns-packet.h b/src/resolve/resolved-dns-packet.h
index 8f062d24ece..96e020a45cf 100644
--- a/src/resolve/resolved-dns-packet.h
+++ b/src/resolve/resolved-dns-packet.h
@@ -355,6 +355,25 @@ const char *format_dns_ede_rcode(int i, char buf[static DECIMAL_STR_MAX(int)]);
 const char* dns_protocol_to_string(DnsProtocol p) _const_;
 DnsProtocol dns_protocol_from_string(const char *s) _pure_;
 
+/* https://www.iana.org/assignments/dns-svcb/dns-svcb.xhtml#dns-svcparamkeys */
+enum {
+        DNS_SVC_PARAM_KEY_MANDATORY        = 0,     /* RFC 9460 section 8 */
+        DNS_SVC_PARAM_KEY_ALPN             = 1,     /* RFC 9460 section 7.1 */
+        DNS_SVC_PARAM_KEY_NO_DEFAULT_ALPN  = 2,     /* RFC 9460 Section 7.1 */
+        DNS_SVC_PARAM_KEY_PORT             = 3,     /* RFC 9460 section 7.2 */
+        DNS_SVC_PARAM_KEY_IPV4HINT         = 4,     /* RFC 9460 section 7.3 */
+        DNS_SVC_PARAM_KEY_ECH              = 5,     /* RFC 9460 */
+        DNS_SVC_PARAM_KEY_IPV6HINT         = 6,     /* RFC 9460 section 7.3 */
+        DNS_SVC_PARAM_KEY_DOHPATH          = 7,     /* RFC 9461 */
+        DNS_SVC_PARAM_KEY_OHTTP            = 8,
+        _DNS_SVC_PARAM_KEY_MAX_DEFINED,
+        DNS_SVC_PARAM_KEY_INVALID          = 65535  /* RFC 9460 */
+};
+
+const char* dns_svc_param_key_to_string(int i) _const_;
+const char *format_dns_svc_param_key(uint16_t i, char buf[static DECIMAL_STR_MAX(uint16_t)+3]);
+#define FORMAT_DNS_SVC_PARAM_KEY(i) format_dns_svc_param_key(i, (char [DECIMAL_STR_MAX(uint16_t)+3]) {})
+
 #define LLMNR_MULTICAST_IPV4_ADDRESS ((struct in_addr) { .s_addr = htobe32(224U << 24 | 252U) })
 #define LLMNR_MULTICAST_IPV6_ADDRESS ((struct in6_addr) { .s6_addr = { 0xFF, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x03 } })